Machine for treating rubber and other heavy plastic material



May 5,- 1925. l

F.- H. BANBURY MACHINE FOR TREATING RUBBER AND oTgiER, HEAVY PLASTIC MATERIAL,

Filed sept; 13. 1922 2 sheets-sneer atented May 5,1925. i

UNITED tsar-Ares FERNLEY PATENT' o'FFrcE.

H. BANBURY, `Oli' ANSONIA, CGNNECTICUT, ASSIGNR TO BIRMINGHAM'.

IRON FOUNDRY,. 0F DERBY, CONNECTICUT, A CORPORATION.

MACHINE ron. rnnArrnG 'RUBBER ANDIbTHER HEAVY PLASTIC MATERIAL.

Application filed September.y 13, 1922. Serial No. 587,926.

T o all whom it may concern Be it kn'own that I, FERNLEY H. BANBURY, a citizen of'the United States, residing at Ansonia, inthe-county of New Haven and State of Connecticut, have invented a new and useful Improvement' in Machines .for Treating., Rubber and Other Heavy Plastic Material; and l do herebydeclare the tollowing, when taken in connection with the accompanying drawings `and the characters of reference marked thereon,`to be a full,

" clear, and exact descriptionof' the same, and which said drawingsconstitute part of this CFI.

application, and -represent, in- .v Fig. 1 a vertical sectional View oi a mixing machine, illustrating one form of my invention.

Fig. 2 a side View of the suction pipe. Fig. 3 a planview oft the same. Fig. i a side view partly in section show ing 'the application of my invention to an- 'other form of mixer.

, Fig. 5 a side view of the suction pipe.

This invention iielates to animprovement in machines for mixing rubber and:` other heavy plastic maiterial. In mining-rubber certain powders, many 'of which arelight and'easily make dust, are introduced during the process and sometimes volatile poisonous liquids are used.v lit is also desirable from timeto time to open the machine to examine the condition of the mixture.

are partially tree the dust or vapor will escape into the room and Apossibly into the face of the operator, making it notonly unpleasant but possibly dangerous.- The object ot this invention is to provide a suction'pipe opening out of the machine so that before or at the time the machine is opened a draft 1,279,220, in which ay neck ldoltthe machine 5 opens into vthe top oi a mixing chamber 11` in which the'usual rotors 12'.are\mounted, opening intothe `neck is .a hopper 13 pro-y `vided with a hinged cover lili.' Above the 'hoppr is a suction pipe 15 connected with suitable suction mechanism. rl`he lower Harit. the machine be opened while the powders or liquid ing long, narrow end 16 ofthe pipe opens into the hopper in rear pf the rear edge of the cover 11i. In the pipe is a damper 17 provided with an operating lever 18 having a hook 19 at its outer end to engage with the outer edge of the cover '14.- when the cover is raised. Normally. the damper will stand horizontally so as to close the suction pipe 15 and before opening the, cover the operator turns the damper by raising the lever 18 and then when the cover is raised it rhaycbe engaged by the hook 19` so that the cover is heldopcn and at the same time the damper is alsogheld open. The weight ofthe operat ing-lever 18 is suilicient to automatically ,close the damper when released from the rover. With suction thronghthe pipe 15 all dust and vapor which might rise; due to the rotation of the rotors, will be drawn into the pipe and not escape into theroom, thus making it more pleasant and healthier for the operator.

In Fig. i of thadrawings l illustrate ani other form of 'mixing machine like that shown in Patentlfiof 1,279,824.' @ne side oi Dthe neck is providedwitha hinged door 20 which when open forms a chute for loading the chamber,V ln this construction 1 mount a i suction pipe 21 with v'its lower flaring open end above the upper edge ofthe door 201 and so that when the door is opened dust or vapor rising from the chamber will be .drawn oft so as no-t to escape int-o the room. W Alit will be understood {that in both cases, "whenthe cover is closed, the. suction is out.

oii, so that it is effective onlypwheh'then doorv is open. l

l'claim: y 1. 'in a machine of the. class described the combination with a' chamber of an opening into said chamber, and a suction-pipe having a long narrow'mouth arranged above said opening. at-the rear thereot.

2. lin a machine ofi the class described the combination with a chamber ofvan opening into said chamber Iand favsuction-pipe having a long, narrow flaring mouth arranged above said opening at the rear thereof.

3. In a machine of the classy described. the

combination with a chamber of .a hopper opening into said chamber, a cover for said hopper, a suction-pipe opening out of said hopper, a damper in the said pipe, a lever connected with said damper and provided with a hook to engage -with the said` cover.

4.111 a machine of the Vcharacter described, the combination with the feed opening thereof, of a suction device adjacent thereto, and automatic means for limiting the action of the suction device to the period when the powder-feed is open.

5. In a machine of the character described, the combination with the powder.- feed, of a suction device adjacent thereto, a closure for the suction device, and means held lby vthe closure when opened topermit the suction. device tov operate.

6. In a machine of the character described, the combination with a. pmvtleir-eeil, Iof a closure therefor, a suction device havingla long, narrow opening located adjacent to the inner portion of the closure, and means for limiting the action of theeuction device to the period when thedesureie open. In testimony whereof, I have signed this specii'cation inthe 4scribing witnesses.

FERNLEY H. BANBURY.

' MALCOLM P. NICHoLS, M. E. HUNTINGTON.

presence of two eub- 

